Cisco
maintains a 60% market share in the routing and switching market, according to
the most recent numbers from IDC.

HPE/Aruba

Lately,
Aruba’s been pushing into the core switching market, releasing new hardware to
go with its ArubaOS-CX operating system, which it bills as an all-in-one
solution for visibility and management for an increasingly IoT-heavy
enterprise network.

Juniper

Juniper
clawed out 3.5% annual growth in the switching and routing market in 2016,
according to IDC.

Huawei

Huawei’s
share of the WLAN market grew 77% between 2015 and 2016, according to the
latest available numbers from IDC.

It’s
still going through some consolidation, given the 2015 deal that saw it
combine with Fluke Networks, Arbor Networks and VSS Monitoring in a complicated not-actually-a-merger.

The
combined company has a huge market presence in Network
Performance Monitoring and Diagnostics (NPMD, and is one of the top
vendors for hyperscale data centers. It’s one of just three leaders in
Gartner’s most recent NPMD Magic Quadrant, despite the fact that it’s suing
Gartner over a previous report.

NetScout
announced that it had reached a milestone in the integration of its real-time
information platform with Arbor’s threat-analysis tool, strengthening its
network monitoring and security capabilities.

Gartner
says NetScout has the biggest NPMD revenues of anybody in the market, between
$500 million and $750 million per year.

Extreme Networks

The name makes it sound like a company that markets energy
drinks, but Extreme Networks is suddenly a company with an impressively
complete portfolio of enterprise networking offerings.Having bought up Brocade’s data-center business from Broadcom,
nabbed Avaya’s networking business and acquired Zebra Technologies' LAN
business in 2016, Extreme’s existing switching and routing now forms
the basis of a surprise up-and-comer on the enterprise networking scene.

Dell/EMC

While
the company’s hardware may not have the same reputation as some of its
competitors’, the fact that a wide range of different software can be run on
it means that there’s a great deal of flexibility – a strong value proposition
for users looking to embrace more virtualized network technologies. Pretty
good fit for a company that also technically owns VMware, although the latter
firm still operates with a high degree of independence.

Dell’s
using both its investments in VMware and its own open networking gear to offer
an attractive option to companies that want to get into advanced technologies
like hyperconverged infrastructure.